3800 cam Sensor Replaced Three Times. The 1990 Buick 3800 was a car my father purchased 10 years before his death and I have repainted and restored it to like new and drive it daily.. The upper intake manifold is a very common failure point on the venerable GM 3800 Series II Engine. Often when it begins to fail, the car will show the symptoms of a head gasket failure, however actual head gaskets failing on this engine is VERY rare.. 3800 specific engine swap info. First, a little 3800 info: The 3800 first appeared in 1988. It is virtually the same as the FWD Buick 3.8 with the exception of having the oil pump located in the timing cover and used DIS instead of a distributor..
View sensor location pictures for the GM 3400 and 3100 V6 engine used in Chevrolet, Buick, Pontiac and Oldsmobile cars and trucks.. Keep up with professional automotive industry news and Tech Tips. Get updates on repairs, diagnostics, and factory-issued technical service bulletins.. Scribd is the world's largest social reading and publishing site..